Seiko Presage Sharp Edge Series Mechanical Automatic GMT Black-Dial

SPB221
(SARF005)

SPB221 Specification:

Movement 
Caliber: 6R64
Movement Type: Automatic with mechanical self-winding (with manual winding)
Accuracy: Day difference 25 seconds to -15 seconds
Power Reserve: Approx 45 hours at maximum
Jewel: 29

Exterior
Case Material: Stainless Steel with diamond shield
Case size: Thickness 13.7mm, Diameter 42.2mm 
Crystal: Sapphire
Crystal Coating: Anti-reflective coating on the inner surface
Lumibright:  Yes (needle/index)
Dial: Black
Clasp: Three-fold clasp with push button release

Other Details 
Water resistance: 10 Bar 
Magnetic resistance: Yes
See-through back
Screw back (For manufacturing reasons, there are individual differences in the orientation of the back lid)
With 24-hour hand
Calendar interlocking time difference correction function
Power reserve display function
With date hand
Second-hand stop function

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